MINI UV The Germ-killing UV Light for Mini-Split AC Mini-split AC systems are becoming more and more popular worldwide. Unfortunately they are, like all AC systems, prone to internal mold growth. Mold growth robs efficiency and can be a health risk as well. In addition, a wide variety of airborne biological contaminants such as germs, viruses, pollen, and allergens, breed in or are spread by the air system. Until now UV light disinfection systems were too large for mini-splits. The solution is Mini UV.